Mitsubishi heat pumps

Mitsubishi Electric units with a Wi-Fi adapter (MAC-567IF and friends) are driven through MELCloud, with the account the MELCloud app uses. The password is stored encrypted with AUTH_SECRET and never shown again.

#Connect

Devices, Add a device, Mitsubishi (MELCloud), sign in with the MELCloud email and password. Every unit on the account is added:

• Air-to-air (split units): power, mode (heat, dry, cool, fan, and auto when the model has it), target temperature in half degrees, room temperature.
• Air-to-water (Ecodan): power and the zone 1 target and room temperature, and, with a hot water tank, its temperature and a Boost hot water switch (MELCloud's forced hot water mode).

Every control answers at once on the card and goes out as one command once you stop tapping; a spinner shows while it's sent. If MELCloud refuses it, the card goes back to what the unit last reported and says why in red.

Find new units adds units added to the account later; Disconnect removes the account and its units.

#Limits

MELCloud is a cloud service: when it's down, so is heating control. It also rate limits accounts that poll too often, which is why units are read every two minutes. Accounts moved to MELCloud Home use a different service and aren't supported.